Group grading in discussion board

I have created group assignments that are a discussion board response or dialogue. The problem is that one member of group submits a graded response and I grade it through the grade center and provide comments. That is all well and good except I have to repeat it all for each member of the group – I copy and paste the comments into the user feedback. Even though I have a smart view for each group, it is still laborious and time consuming to copy/paste into each student in the group. I really like the way it does it in a non-discussion board assignment –where grade and comment go to each member and can alter each member as needed.